From what I can glean from various online Pathfinder communities, there's almost as much an interest in who will be providing PF 1E 3PP publishings as there are people interested in PF 2E Paizo stuff.
The number of 3PPs supporting 1E play has diminished considerably, but the ones remaining are quality (Legendary, Drop Dead, etc). It'll be interesting to see how that demographic segment plays out. Plus, Purple Duck Games, a solid 2nd tier PF 1E 3PP, is working on an ambitious proprietary core rules system that is basically PF 1.5E. Or 3.PF9999. In essence, they're trying to "fix" all the metric-tonnes and mass quantities of 1E imbalances that are Shit Show-worthy.
Definitely don't underestimate the sizable community of PF 1E fans who are terrified of invalidating their thousands of $$'s of 1E book investments. Especially since 2E's D&D 4E-esque veneer is causing a lot of gamer palms out there to sweating nervously.